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Showing 1 to 20 of 85 for “"Antenna Systems"”.
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Antenna systems research
… is an overview of a number of investigations on antenna systems and related subjects over a period of 28 years, which has resulted in 44 publications in the technical literature, one current patent, and an M.Sc. thesis. The investigations have been grouped into 7 categories: - Log periodic …
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Substrate integrated waveguide antenna systems
… very promising technology for current and future systems operating in K-band and above. Therefore, all the work presented in this dissertation focuses on SIW technology. Five di erent antenna systems are proposed to verify the advantages of using SIW technology. First, a novel K-band end- re SIW …
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Adaptation For Multi-Antenna Systems
Previous attempts to adapt MIMO systems in the presence of varying channel conditions typically focus on characterizing the performance of a limited and predefined set of joint MoDem/CoDec and MIMO configurations over a representative set of channel realizations. Other work has attempted to adapt …
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Multiservice Ethernet Digital Distributed Antenna Systems
… a novel multi-service digital distributed antenna systems (DDAS) for indoor wireless coverage, which not only is able to transport multiple wireless carriers from different vendors and mobile operators, but also allows a converged architecture to integrate indoor wireless system with …
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Development And Characterization Of Beamforming Antenna Systems
… discusses the development of the beamforming antenna systems as a scaled model for customized RFID systems. In this work, an Fabry-Perot Cavity (FPC) antenna system consisting of a single source and frequency selective surface (FSS) is proposed (chapter 2) and investigated. Since the FPC …
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Adaptive antenna systems for mobile broadband communications
… for high-data-rate/high-mobility wireless systems, with improved network performance and enhanced economics. One technology thrust in wireless communications is the use of adaptive antennas at the transceivers, along with the associated advanced array signal processing, to improve cell …
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Multiple-antenna systems in ad-hoc wireless networks
… wireless networks as a function of the number of antennas per node, link-length, interferer density, and path-loss-exponent (an environmental parameter that determines signal decay with distance), under assumptions chosen for realistic implementability in the near future. These results improve our …
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Signal Amplitude Limiting and Phase Quantization in Antenna Systems
Made available in DSpace on 2014-12-04T21:03:12Z (GMT). No. of bitstreams: 1 6001615.pdf: 2978676 bytes, checksum: 6732139fc2af35b9f26f2ca62d076170 (MD5) Previous issue date: 1960
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Signal Amplitude Limiting and Phase Quantization in Antenna Systems
Submitted by Carly Hafner (chafner2@illinois.edu) on 2014-07-03T14:43:20Z No. of bitstreams: 1 1959_Bitzer.pdf: 2866475 bytes, checksum: c1ee2ac748fb2df730089e8347d2047e (MD5)
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Analysis of reflector antenna systems for wide-angle scanning
ETDs are only available to UIUC Users without author permission
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Innovative strategies for the synthesis of Time-modulated antenna systems
… of the synthesis of time-modulated array antennas for communication purposes, the thesis focuses on the analysis and the development of innovative approaches aimed at reducing the power losses related with the undesired harmonic radiations. The accurate analysis of the problem in hand has …
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Time series analysis of indoor millimetre wave distributed antenna systems
… deteriorations is the application of distributed antenna systems (DASs) upon which the research in this thesis is focused. In this work, a distributed mmWave measurement system operating at 60 GHz is designed in order to take the snapshots of the signal received simultaneously at multiple …
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Feedback schemes in angular domain processing for MIMO antenna systems
Multiple transmit and multiple receive antenna (MIMO) systems provide an additional spatial dimension that yields a degree of freedom gain. The degree of freedom gain in MIMO systems allows for spatial multiplexing of multiple data streams onto the channel and an increase in the channel’s capacity …
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Propagation models for multiple-antenna systems : methodology, measurements and statistics
… is towards utilization of multiple antenna systems. While techniques such as beam-forming and spatial diversity have been implemented for some time, the emergence of Multiple-Input Multiple-Output (MIMO) communications has increased commercial interest and development in …
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Analytical Framework for the Performance Analysis of Multiple Antenna Systems
There has been great interest in antenna array processing (diversity, beamforming, null steering, and spatial multiplexing) to enhance the received signal quality and the capacity of wireless communications systems. However, in order to properly exploit the characteristics of different array …
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Analysis, design and implementation of front-end reconfigurable antenna systems (FERAS)
The increase in demand on reconfigurable systems and especially for wireless communications applications has stressed the need for smart and agile RF devices that sense and respond to the RF changes in the environment. Many different applications require frequency agility with software control …
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Innovative Combinatorial Strategies for the Synthesis of Radar Tracking Antenna Systems
… framework of the synthesis of monopulse array antennas for search-and-track applications, the thesis focuses on the development and the analysis of a method based on the sub-arraying technique aimed at generating an optimal sum and compromise difference patterns through an excitation matching …
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Numerical models of new HF shipboard communication antenna systems for improved survivability
There are many shipboard communication antenna problems where the number, type, location, or survivability of a given antenna in the system is a parameter which can be varied to determine the overall optimal system. This thesis investigates computer numerical models f or improving the time that an …
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Implementations of Multi-Antenna Systems in a USRP Based SDR using Simulink
Software Radio systems are one of the most versatile and cost effective systems for pro- totyping communications techniques in use today. Through the use of minimal hardware, typically only an RF front end, an SDR allows for as much of the signal processing as possible to be done via software. The …
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